Can you post a photo of the whole kitchen? Is that a countertop depth fridge?

Should have replaced with another SZ.

Wrong fridge for the spot. You can't even fully open the doors, you are up against a WALL. I wouldn't spend the money to make this wok. Stand back, take a better picture of the entire kitchen please.

I am sorry, but no amount of filling in the upper space will fix this. The frig is too wide and too deep for the space. Can you please take a photo farther back?

The filler, side panel and crown molding need to be removed - if you can preserve the crown do so. Next have an electrician move your outlet down - each appliance has a certain placement for the electrical outlet. The sub-zero obviously was high - so that really needs to be relocated. Sub-zero's hinges are different than your new french door refrigerator so the comments about the frig being too wide is reflective of that. Typically a designer would place a large 6" wide filler in order to give the door clearance off a wall. If you know the manufacturer of the original cabinets you can find a dealer in your area who can order you what you need. If you are looking for a cheaper way to go my suggestion (after removing these pieces) get a wide and tall basket or have a shelf put in and place a large decorative plate or two - maybe something that goes with the butcher/cow piece you have above...

You bought a new fridge, but it isn’t a SZ. Therein lies your mistake. For starters, the SZ was built in, what you bought to replace it, isn’t. That’s like trying to fit a round peg into a square hole.

I need to see the space from further back to even begin to guess. It looks like the fridge is too big for the space.

I store several serving trays up there.